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Encrypting Data in Node.js

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  • Last Updated : 14 Oct, 2021
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Encryption and Decryption in Node can be done by installing and implementing the ‘crypto’ library. If you have installed Node.js by manual build, then there is a chance that the crypto library is not shipped with it. You can run 
the following command to install the crypto dependency.

npm install crypto --save

But you don’t need to do that if you have installed it using pre-built packages.
Example for implementing crypto in Node. 


// Nodejs encryption with CTR
const crypto = require('crypto');
const algorithm = 'aes-256-cbc';
const key = crypto.randomBytes(32);
const iv = crypto.randomBytes(16);
function encrypt(text) {
let cipher = crypto.createCipheriv('aes-256-cbc',Buffer.from(key), iv);
let encrypted = cipher.update(text);
encrypted = Buffer.concat([encrypted,]);
return { iv: iv.toString('hex'), encryptedData: encrypted.toString('hex') };
function decrypt(text) {
let iv = buffer.from(text.iv, 'hex');
let encryptedText = Buffer.from(text.encryptedData, 'hex');
let decipher = crypto.createDecipheriv('aes-256-cbc', Buffer.from(key), iv);
let decrypted = decipher.update(encryptedText);
decrypted = Buffer.concat([decrypted,]);
return decrypted.toString();
var gfg = encrypt("GeeksForGeeks");



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